Vector Arms is a good source for you to start with as it has lots of information on their Uzi models as well as some others. I don't own one, so I can't say much about them, but if I was to get one I would get a new one from Vector, or one of their dealers. Not long ago their was a group purchase on AR15, but I don't know how it went. I believe it was in the Full Auto, or Pistol Caliber forum for awhile.